Create plan and process for Trilinos testing with new compilers before important Trilinos customers

Created by: bartlettroscoe

@trilinos/framework

Trilinos needs to be testing with newer compiler versions as they come out so that we our customers start testing with newer compilers. That way Trilinos is not always playing catch-up. We need a plan for doing this and we need a process for doing this.

An example of what happens right now is demonstrated in #3497 (closed) and #3499 with the upgrade of ATS-1 ('mutrino', 'trinity') from Intel 17 to Intel 18.

NOTE: I marked this with the label 'epic' since that is what this is.